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HAProxy - Load balancer
b3ac1a636c
The quic_conn struct is modified for two reasons. The first one is to store the encoded version of the local tranport parameter as this is done for USE_QUIC_OPENSSL_COMPAT. Indeed, the local transport parameter "should remain valid until after the parameters have been sent" as mentionned by SSL_set_quic_tls_cbs(3) manual. In our case, the buffer is a static buffer attached to the quic_conn object. qc_ssl_set_quic_transport_params() function whose role is to call SSL_set_tls_quic_transport_params() (aliased by SSL_set_quic_transport_params() to set these local tranport parameter into the TLS stack from the buffer attached to the quic_conn struct. The second quic_conn struct modification is the addition of the new ->prot_level (SSL protection level) member added to the quic_conn struct to store "the most recent write encryption level set via the OSSL_FUNC_SSL_QUIC_TLS_yield_secret_fn callback (if it has been called)" as mentionned by SSL_set_quic_tls_cbs(3) manual. This patches finally implements the five remaining callacks to make the haproxy QUIC implementation work. OSSL_FUNC_SSL_QUIC_TLS_crypto_send_fn() (ha_quic_ossl_crypto_send) is easy to implement. It calls ha_quic_add_handshake_data() after having converted qc->prot_level TLS protection level value to the correct ssl_encryption_level_t (boringSSL API/quictls) value. OSSL_FUNC_SSL_QUIC_TLS_crypto_recv_rcd_fn() (ha_quic_ossl_crypto_recv_rcd()) provide the non-contiguous addresses to the TLS stack, without releasing them. OSSL_FUNC_SSL_QUIC_TLS_crypto_release_rcd_fn() (ha_quic_ossl_crypto_release_rcd()) release these non-contiguous buffer relying on the fact that the list of encryption level (qc->qel_list) is correctly ordered by SSL protection level secret establishements order (by the TLS stack). OSSL_FUNC_SSL_QUIC_TLS_yield_secret_fn() (ha_quic_ossl_got_transport_params()) is a simple wrapping function over ha_quic_set_encryption_secrets() which is used by boringSSL/quictls API. OSSL_FUNC_SSL_QUIC_TLS_got_transport_params_fn() (ha_quic_ossl_got_transport_params()) role is to store the peer received transport parameters. It simply calls quic_transport_params_store() and set them into the TLS stack calling qc_ssl_set_quic_transport_params(). Also add some comments for all the OpenSSL 3.5 QUIC API callbacks. This patch have no impact on the other use of QUIC API provided by the others TLS stacks. |
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HAProxy
HAProxy is a free, very fast and reliable reverse-proxy offering high availability, load balancing, and proxying for TCP and HTTP-based applications.
Installation
The INSTALL file describes how to build HAProxy. A list of packages is also available on the wiki.
Getting help
The discourse and the mailing-list are available for questions or configuration assistance. You can also use the slack or IRC channel. Please don't use the issue tracker for these.
The issue tracker is only for bug reports or feature requests.
Documentation
The HAProxy documentation has been split into a number of different files for ease of use. It is available in text format as well as HTML. The wiki is also meant to replace the old architecture guide.
Please refer to the following files depending on what you're looking for:
- INSTALL for instructions on how to build and install HAProxy
- BRANCHES to understand the project's life cycle and what version to use
- LICENSE for the project's license
- CONTRIBUTING for the process to follow to submit contributions
The more detailed documentation is located into the doc/ directory:
- doc/intro.txt for a quick introduction on HAProxy
- doc/configuration.txt for the configuration's reference manual
- doc/lua.txt for the Lua's reference manual
- doc/SPOE.txt for how to use the SPOE engine
- doc/network-namespaces.txt for how to use network namespaces under Linux
- doc/management.txt for the management guide
- doc/regression-testing.txt for how to use the regression testing suite
- doc/peers.txt for the peers protocol reference
- doc/coding-style.txt for how to adopt HAProxy's coding style
- doc/internals for developer-specific documentation (not all up to date)
License
HAProxy is licensed under GPL 2 or any later version, the headers under LGPL 2.1. See the LICENSE file for a more detailed explanation.